<template>
    <div>
      <!--   面包屑导航栏   -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>

      <!-- 卡片 -->
      <el-card>
        <!-- 添加角色按钮区域 -->
        <el-row>
          <el-col>
            <el-button type="primary">添加角色</el-button>
          </el-col>
        </el-row>

        <!-- 角色列表区域 -->
        <el-table :data="rolelist" border stripe>
          <!--    展开列      -->
          <el-table-column type="enpand">
            <template slot-scope="scope">
              <el-row class="['bdbottom', i1 === 0? 'bdtop':'', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                <!-- 渲染一级权限 -->
                <el-col :span="5">
                  <el-tag  closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 渲染二、三级权限 -->
                <el-col :span="19">
                  <el-row :class="[i2 === 0? '':'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                    <el-col :span="6">
                      <el-tag type="success"  closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <el-tag type="warning" c-for="(item3, i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>

            </template>
          </el-table-column>
          <!-- 索引列 -->
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
              <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
              <el-button size="mini" type="warning" icon="setting" @click="showRightDialog(scope.row)">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>

      </el-card>

      <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
        <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id"
                 default-expand-all default-checked-keys="defKeys" ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
      </el-dialog>
    </div>
</template>

<script>
    export default {
      name: "Roles",
      data() {
        return {
          //所有角色列表数据
          rolelist: [],
          // 控制分配权限的对话框
          setRightDialogVisible: false,
          rightslist: [],
          //树形空间
          treeProps: {
            label: 'authName',
            children: 'children'
          },
          // 默认选中的结点数组
          defKeys: [],
          roleId: ''
        }
      },
      created() {
        this.getRoleList()
      },
      methods: {
        //获取所有角色的列表
        async getRoleList() {
          const {data:res} = await this.$http.get('roles')

          if(res.eta.status !== 200) {
            return this.$message.error('获取角色列表失败')
          }

          this.rolelist = res.data
        },
        // 根据id移除权限
        async removeRightById(role, rightId) {
          cont confirmResult = await this.$confirm('此操作将删除权限', '提示', {
            confirmButtonText: '确定',
            confirmButtonText: '取消',
            type: 'warning'
          }).catch(err => err)

          if(confirmResult !== 'confirm') {
            return this.$message.error('取消了删除')
          }
          const {data:res} = await this.$http.delete(`rights/${role.id}/rights/${rightId}`)

          if(res.meta.status !== 200) {
            return this.$message.error('删除权限失败')
          }
          role.children = res.data
        },
        async showRightDialog(role) {
          this.roleId = role.id
          // 获取权限的数据
          const {data:res} = await this.$http.get('rights.tree')
          if(res.meta.status !== 200) {
            return this.$message.error('获取权限失败')
          }

          // 把货渠道的全线数据保存到 data 中
          this.rightslist = res.data

          // 递归获取三级结点id
          this.getLeafKeys(role, this.defKeys)

          this.setRightDialogVisible = true
        },
        // 通过递归的形式获取角色下所有三级权限
        getLeafKeys(node, arr) {
          if(!node.children) {
            return arr.push(node.id)
          }
          node.children.forEach(item => this.getLeafKeys(item, arr))
        },
        setRightDialogClosed() {
          this.defKeys = []
        },
        async allotRights() {
          const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys()
          ]

          const idStr = key.join(',')
          const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{ rids:idStr})
          if(res.meta.status !== 200) {
            return this.$message.error('分配权限成功')
          }
          this.getRoleList()
          this.setRightDialogVisible = false
        }
      }
    }
</script>

<style lang="less" scoped>

  .el-tag {
    margin: 7px;
  }

  .bdtop {
    border-top: 1px solid #eeeeee;
  }

  .bdbottom {
    border-bottom: 1px solid #eeeeee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }

</style>
